Machine-tool.



` Nb. 724,514. n PATE'NTED'APRV, 1903.

' W. SELLERS."

MACHINE TOOL.

APPLIQATION FILED JAN. 1,6, 1902. No MODEL. 2 SHEETS-SHEET 1.

. y ATTORNEYS No. 724,514. i-PATENEED AEE-'7,1903'.

W. SELLERS. l MACHINE T0011..

APPLIQATION HEED JAN. 16, 1902. No MODEL. 2 sHEETs-snEET-R.

we mms rusas oo. womLm-m., msnmamn. nl".

NITED STATES .'-YPATENT OFFICE.

WILLIAM SELLERS AND COMPANY,

TION OF PENNSYLVANIA.

INCORPORATED, A CORPORA- MACHINE-Tool..

SPECIFICATION forming part f Letters Patent N0. 724,514, dated April 7, 1903. Application filed January 16,1902. Serial No. 89,956. (No model.)

To all whom, it 1nlayc07ece7n.-

Beit known that I/VILLIAM SELLERS,a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have inventeda new and useful Improvement in lNIachine-Tools, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this 1o specification.

My invention relates more particularly to that class of machine-tools in which the cutting-tool is carried by a slide-rest supported by uprights attached to a bed, between which uprights the work is reciprocated or rotated, as in the planing-machine and the boring and turning mill. In such machines as heretofore constructed the cross-head which forms a part of the slide-rest is securable against the face zo of the uprights, upon which it may be raised or lowered to suit the work to be operated upon. In machines of this character the toolcarrier is movable at right angles with the cross-head, the cutting-tool always projecting z 5 below the cross-head, and in large machines it is often required to project very far below. In all cases a tool so supported must cause a considerable torsional strain in the crosshead, and in large machines where. the distance between theuprirght supports is great the distance below the cross-headY at which the cutting-tool can work efficiently is comparatively small, because the section of crosshead at the up rights cannot be increased withont introducing other elements of disturbance equally injurious. Aside from this the crosshead is only bolted against the face of the uprights, so that it becomes a brace between the two uprights to support the lateral strains 4o thereon within the limits of friction only.

One object of my invention, therefore, is to provide a form of cross-head which shall resist these torsional strains without transmitting them through that section of the crosshead which is bolted to the face of the uprights; another is to provide this form of cross-head with means for bolting it between the uprights, as well as to the face thereof another is to provide, in addition to the plane surface on the face of the uprights, plane surfaces between the uprights, to which the cross-head may be bolted, whereby the cross` head may be raised, lowered in a vertical line, and properly secured, and another is to provide means for raisingand lowering this crosshead between its guiding-surfaces without disturbing its parallelism to the table which supports the work the cutting-tool operates upon. The means by which these objects are accomplished are set forth in the following specication.

In the drawings, Figure l is a front view of my improved machine-tool. Fig. 2 is a side elevation of the same with a portion in section. Fig. 3 is a sectional plan view on the line 3 3 of Fig'. 2. Fig. 4 is an enlarged detail plan nview of the front clamp. Fig. 5 is a front view of the same. Fig. 6 is an enlarged plan viewof the rearclamp. Fig. 7 is a rear view of the same.

A is the table of the machine upon which the work is secured. This table is, recipro- -cated or rotated, as the case may be, upon the bed B, to which are secured the uprights C C, connected at the top by the cross-beam C4.

The cross-head D .I is composed of the bar D, which extends across thefront of the uprights C C, and integral with the bar D is the cross-beam J, which extends rearwardly between uprights C C.- The cross-head D .I is securely clamped to the frontand rear portions of the uprights preparatory to operating upon the work secured upon thetable A below it.

To adjust the cross-head D J vertically, it is suspended by four screws'F F F F, one on each front face and one on each rear face of Ithe two nprights C C. lTwo of these screws F F on the front faces of the uprights are suspended from the stands F and F', secured upon the top of the uprights, so that the screws will pass behind the cross-barD of the cross-head DJ, and to this end these screws are sunk into the front faces of the uprights C and C. The other two screws are suspended from the stands F F", secured upon the top of and over the rear face of the uprights C C. All four of these screws are roupon the shaft E, supported by the stands F F. The bevel-wheels tr a a ci at the front and rear faces of the uprights are geared together by the pinions b b b b', of like diameter, mounted upon shafts E E', supported by the stands F and F", and all four of the .Y

screws will be rotated together at a uniform velocity by turning the crank-arm C3, mounted upon the end of the shaft E,.Fig. l. The nuts E on the screws F F in the front vertical faces of the uprights C Gare bolted to the cross-bar D of the cross-head D J by the screw-bolts d d d d, and the nuts J on the screws F F on the rear vertical sides of the uprights C are bolted to a stand J', Fig. 7, on the rear vertical side of the frame or beam J,which is a part of I'the cross-head D J. To this stand J above and below the nut J are clamps d'd d' d', Fig. 6, to grip the stand J.' against the s ide of the rib K, which extends from bottom to top of the rear Vertical sid es of the uprights C C, and in the front vertical faces of the uprights the clamps G are mounted above and below the nut E", Figs. 4. and 5, whereby the cross-head may be raised or lowered and clamped against the face of the uprights and between the uprights, so as to resist strains in every direction.

The apparatus on the cross-bar D for holding and operating the cutting-tool is that in ordinary use and forms no part of the present invention, and as its mode of operation is well known any detailed description thereof is unnecessary.

As in many cases it may be advisable not to extend the cross-head between the uprights so far back as to the rear face of the uprights, I do not limit my invention to a cross-head extending the whole depthof the uprights.

Having now fully described` my invention, what I claim, and desire to protect by Letters Patent, is-

1. In a machine of the character described, the combination of a pair of uprights, a crosshead vertically movable on said uprights, said cross-head comprising a tool-carrying member in front of said upright-s, and a rearwardly-extending member entering between said uprights, and clamping members to secure the toolcarrying member and rearwardly-extending member ot the cross-head to the uprights.Y

2. In a machine of the character described, the combination of a pair of uprights, a crosshead vertically movable upon said uprights, said cross-head comprising a tool-carrying member in front ofv said uprights and a rearwardly-extending member entering between said uprights, means to secure the tool-carrying member to the face of the uprights and means to secure the rearwardly-extendin g member to the adjacent sides of the uprights.

In testimony of which invention I have hereunto set my hand, at Philadelphia, on this 10th day of January, 1902.

. WM. SELLERS. Witnesses:

M. F..ELLIs, M. M. HAMrL'roN. 

